Senexin-A

A selective inhibitor of CDK8 (IC50=0.28 uM) and CDK19; inhibits CDK8 and CDK19 ATP site binding with Kd50 of 0.83 uM and 0.31 uM, respectively; inhibits only p21-induced transcription but not other biological effects of p21, inhibits β-catenin-dependent transcription in HCT116 colon carcinoma cells; suppresses damage-induced tumor-promoting paracrine activities of tumor cells and normal fibroblasts and reverses the increase in tumor engraftment and serum mitogenic activity in mice pretreated with doxorubicin.